Global Patent Index - EP 1833237 A3

EP 1833237 A3 2009-02-25 - Retrieval of information embedded in an image

Title (en)

Retrieval of information embedded in an image

Title (de)

Extrahierung von in einem Bild eingebetteter Information

Title (fr)

Extraction des informations incorporées dans une image

Publication

EP 1833237 A3 (EN)

Application

EP 07004514 A

Priority

JP 2006060636 A

Abstract (en)

[origin: EP1833237A2] In an image processing device adapted to restore sub-information from composite image information produced by a composite image producing device which embeds invisible sub-information into visible main image information to produce the composite image information, the frequency components of the sub-information extracted for each of its color components are smoothed (113a, 113b, 113c), and the optimum one is selected (114) from among the results of the smoothing process performed for each color component of the sub-information.

IPC 8 full level (invention and additional information)

H04N 1/32 (2006.01); G06T 1/00 (2006.01)

CPC (invention and additional information)

H04N 1/32251 (2013.01); G06T 1/0028 (2013.01); G06T 1/0071 (2013.01); H04N 1/32208 (2013.01); H04N 1/32229 (2013.01); H04N 1/32309 (2013.01); G06T 2201/0051 (2013.01); G06T 2201/0061 (2013.01); G06T 2201/0083 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA HR MK RS

DOCDB simple family

EP 1833237 A2 20070912; EP 1833237 A3 20090225; EP 1833237 B1 20141022; JP 2007243386 A 20070920; JP 4550749 B2 20100922; KR 100864997 B1 20081023; KR 20070092132 A 20070912; US 2007223780 A1 20070927; US 8045794 B2 20111025